== Sample 5

This sample demonstrates a global embedded Kafka broker in action.

This kind of broker is enabled via `spring.kafka.global.embedded.enabled = true` JUnit Platform property configured in the Maven Surefire plugin.
Additional properties for the underlying `GlobalEmbeddedKafkaTestExecutionListener`, and therefore embedded Kafka broker(s), are provided via standard `junit-platform.properties` file or extra configuration parameters for the Maven Surefire plugin.

Run only `./mvnw test` command for this sample.
The Maven will report to the output similar two log messages:

[source,text]
----
11:03:44.383 [main] INFO  o.s.k.t.j.GlobalEmbeddedKafkaTestExecutionListener - Started global Embedded Kafka on: 127.0.0.1:53671
...
11:03:48.439 [main] INFO  o.s.k.t.j.GlobalEmbeddedKafkaTestExecutionListener - Stopped global Embedded Kafka.
----
One in the beginning of the test plan - and another in the end before reporting failures.

The application by itself is going to fail because it has a configuration like `spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}`.
This property makes it available only when an `EmbeddedKafkaBroker` is started, which is done by the `GlobalEmbeddedKafkaTestExecutionListener` and only when `spring.kafka.global.embedded.enabled = true`.
Running unit tests from IDE will lead to similar failure -  the `GlobalEmbeddedKafkaTestExecutionListener` is not enabled by default and there is no an `@EmbeddedKafka` present in these tests.

The `Sample05Application2Tests` demonstrates that global embedded Kafka broker config for {@code auto.create.topics.enable=false} is in an effect.
See `kafka-broker.properties` added via Maven Surefire plugin.
See `/test/resources/kafka-broker.properties` and Maven Surefire plugin configuration in the pom.xml.
